Steam-shovel.



I PATEITTED MAY 31,1904. G. w. KING, H. J. BARNHART & c. B. KING.

STEAM SHOVEL.

APPLIOATIOK FILED 001.31, 1902.

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athouyut No. 761,079. PATENTBD MAY 31, 1904. G. W. KING, H. J. BARNHART & G. B- KING.

STBAM SHOVEL.

APPLICATION Hm m 00131, 1902.

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UNITED STATES Patented May 31, 1904.

PATENT OFFICE.

GEORGE W. KING, HARRY J. BARNHART, AND CHARLES B, KING, MARION, OHIO, ASSIGNORS TO THE MARION STEAM SHOVEL COMPANY,

OF MARION, OHIO, A CORPORATION OF OHIO.

STEAM-SHOVEL.

SPECIFICATION forming part of Letters Patent No. 731,079, dated May 31, 1904. Application filed October 31, 1902. Serial No. 129,536. (No model.)

To all whom it may concern.-

Be it known that we, GEORGE W. KING, HARRY J. BARNHART, and CHARLES B. KING, citizens of the United States, residing at Ma- 5 rion, in the county of Marion and State of Ohio, have invented certain new and useful Improvements in Steam-Shovels, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to steam-shovels, and has for one of its objects the production of a construction whereby the apparatus is adapted to work in comparatively narrow spaces such, for instance, as tunnel -work and the I 5 widening of railwaycutsby so constructing the apparatus that the boom may be swung-a considerable distance back of a position at right angles to the length of the apparatus, so as to deliver the material into a car or other I 2 receptacle placed alongside of the apparatus and a considerable distance back from the front thereof. A further object of our invention is to relieve the swinging circle from the greater 25. portion of the strain to which it is ordinarily subjected in that class of steam-shovels in which the swinging circle is located low down near the lower pivot of the'boom. To these and other ends our invention consists in certainnovelfeatures, which we will now proceed to describe and will then particularly point out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of an apparatus embodying our invention in one form. Fig. 2 is a plan view of the same. Fig. 3 is a side elevation of'the A-frame detached. Fig, 4 is a front elevation of the same. Fig. 5 is a detail rear elevation of the upper end of the same. Fig. 6 is a detail sectional View taken on the line 00 w of Fig. 4 and looking in the direction of the arrows, and Figs. 7 and 8 are detail views illustrating the connections between the swinging chains or cables and the boom.

of the apparatus, it comprises a car-body, platform, or support 1, carrying a boiler 2, holst- Referring first to the general constructioning and propelling engines 3, and swingingengines l. At the forward end of the platformis mounted a swinging circle 5, carrying the usual boom 6, provided with the dipper 7 and crowding-engines 8. The swinging circle is operated from a swinging-drum 9, driven by the swinging-engines 4. All of these parts may beof any approved construction, and in'connection with them we employ an A frame 10,which' embodies one of the main features of novelty of 'our invention. This A-frame may be built' up in the usual manner of separate partsfbut we prefer to construct it in a single piece of cast-steel, as shown, and it comprises the head 11 and downwardly-diverging members 12. Near their lower ends the diverging members 12 extend outwardly at an angle approaching the horizontal, as indicated at 13, and then downwardly, as indicated at 14, these downwardlyextending terminations being apertured, as indicated at 14, for the attachment of the A- frame to the car-body 1, which may be effected by means of lugs 16, mounted on supports 17. The outwardly-extending lower portions 13 of the A-frame are preferably connected-by a cross-piece 15, so as to strengthen the lower portion of the A-frame, and this cross-piece when present forms, in efl ect, a continuation of and connection between the outwardly-extending parts 13, so that the A- frame has practically a horizontal base member of greater length than the distance separating thelower ends ofthe members 12, said horizontal base member-being provided with vertical extensions to receive the pivots by which the whole A-frame is supported. The parts 13 lie below the portion of the boom 6 which extends over them when'the boom is swung back into the position shown in dotted lines in Fig. 2, and by reason of this construction we are 'enabled to obtain a wide bearing between the pivotal supports of the A-frame, thus materially strengthening the resistance of the A- frame to lateral strains exerted at its top, while at the same time the boom can be swung back a considerable distance past a position at right angles to the longitudinal axis of the car, as indicated in dotted lines in Fig. 2. In this way it is possible when working in narrow cuts or tunnels to swing the boom around so as to discharge the dipper into a car or other receptacle lying at the side of the apparatus and a considerable distance back of the frontas, for instance, back of the jackbraces.

As heretofore stated, we prefer to cast the A-frame of steel in a single piece, all of the members, including the head, being integral therewith and the parts thereof except the head being hollowed or cored out, as indicated in dotted lines. The leg members will be preferably D-shaped in cross-section, as shown in Fig. 6, and these members may be connected at a point above their lower ends by means of. a crosspiece 18,if desired. The head isprovided with a sleeve or collar 19, in which fits a journal-pin 20, to which the'boom-brace 21 is connected, and thisjournal-pin is held in place bya transverse pin 22, which passes through suitable apertures 23 in the sleeve or collar 19 and through the stem of the journal-pin, which fits within said sleeve or collar, the head of said pin resting on the upper end of-said sleeve or collar,

as shown in Fig. 1. v

Another feature of our invention relates to the connections of the forward ends of the swinging chains or cables. Heretofore it has been customary to attach the forward ends of these chains or cables to the swinging circle or turn-table by which the lower end of the boom is supported, the strain or swinging force thus imparted to the circle or turn-table being transmitted to the boom by means of braces having their forward ends connected to the boom and their rear ends diverging and connected to the swinging circle. This construction is found'to bring severe strains upon the swinging circle, which tend to distort the same, and to obviate this objection we carry the forward portions of the swinging chains or cables around the periphery of theswinging circle in the usual manner, but connect the forward extremities to theboom proper. In the'accompanyingdrawings, referring more particularly to Figs. 1, 2, 7, and 8, the

swinging-chains are indicated at 54 and are shown as passing around the opposite sides of the swinging circle to the front thereof. At this point where the heel of the boom joins the swinging circle the boom is provided with a block or casting 55, having a' throat or opening 56, with curved bearingwalls 57, around which the chains pass and from which they extend through the opening and are connected with threaded bolts 58, provided with adjusting-nuts 59, bearing against suitable abutments 60, supported by the rear upper surface of the boom, these bolts serving to take up the slack of the swinging-cables. It will be observed that by this construction the swinging force is transmitted directly to the boom and the swinging circle is relieved of most of the strain and acts chiefly as a means for spreading the chains and providing-a circular bearing-surface for them. .a In this case the usual braces connecting the boom and swinging circle are greatly relieved.

We do not wish to be understood as limitin g ourselves to the precise details of construction hereinbefore described, and shown in the accompanying drawings, as it is obvious that these details may be varied without departing from the principle of our invention.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is

1.. In a steam-shovel, an A-frame comprisingdownwardly-diverging legs, thelower portions whereof are extended laterally outward to increase the widthof the base of theframe, saidextensionsforming shoulders over which the boom may swing, substantially as described.

2. In a steam-shovel orthe like, the combination, with a body or platform, and a boom pivotally supported thereon, of an A-frame mounted on the body or platform in the rear of the pivotal support and comprisingdownwardly-diverging legs, the lower portions whereof are extended laterally outward to increase the base ofthe A-frame, said laterallyextending portions forming shoulders. over which the boom may swing, substantially as described.

. 3. In a steam shovel or the like, an A-frame comprising downwardly-diverging members forming the legs proper, and a horizontal base member of greater length than the distance separating thelower ends of the leg members proper, said horizontal base member being provided at its ends with downward extensions whereby the A-frame is supported, substantially as described. t y

4:. In a steam-shovel or the like, an Arframe provided with a head havinga sleeve or col lar apertured vertically and transversely, a journal-pin having a headresting on said collarand a stem fitting the vertical aperture of the same and itself transversely apertured, and a transverse pin passing through the transverse apertures in the collar and in the journal-pin stem, substantially as described.

. 5. In a steam-shovel or the like, an A-frame constructed of cast metal in a single piece and comprising a head, downwardly-diverging legs, and a base member extending across and beyond the ends of the legs and having downward extensions, substantially as described.

6. In a steam-shovel or the like, the combination, with a platform or body having a swinging circle located closely adjacentthereto, and a separate boom pivotally mounted thereon and extending upward and outward therefrom, of swinging chains or-cables passing around the peripheral portions of the swinging circle on opposite sides thereof and 3 having their forward ends connected to the boom in front of the swinging circle, substantially as described:-

7 In a steam-shovel or 'the like, the combination, with a platform or body having a swinging circle located closely adjacent thereto, and a separate boom pivotally mounted thereon and extending upward and outward therefrom, of swinging chains orvcables passing around the peripheral portions of the swinging circle on opposite sides thereof and having their forward ends connected to the boom in front of the swinging circle, the boom being provided on its front or under side with a block or casting to receive the strain of the cables, substantially as described.

8. In a steam-shovel or the like, the combination, with a body or platform, a swinging circle mounted thereon, and a boom supported by the swinging circle and provided with a casting having a central opening with curved bearing-walls at its mouth, of swinging chains adjusting-bolts passing through the boom and connected with said ends, substantially as described.

In testimony whereof we aflix our signatures 3 in presence of two witnesses.

GEORGE W. KING; HARRY J. BARNHART. CHARLES B. KING.

Witnesses:

J ACOB FELLMETH, BERT WESTON. 

